There was an article about this and some experiments with current lead
free solder in its various guises (with Rosin, without and with Rosin
substitute) in this months EPE magazine from the UK.

The conclusion was, apart from a hotter iron, the lead free with rosin
is the way to go at the moment. The rosin substitute had a nasty
problem in turning the joints green as the acid leeched out.

They also noted that repairing PCBs that have used lead solder or
components tinned with lead or tinned PCB's caused contamination
problems with lead free solder and that to get the solder to wet
properly the test joints had to be soldered, wicked, and soldered
again before an adequate joint could be made.

They also noted that as there is no lead free bit cleaner as yet, the
iron bit was always going to have some form of contamination on it.

Colin

--
cdb, bodgy1@optusnet.com.au on Wednesday,28 April,2004

I have always been a few Dendrites short of an Axon and believe me it
shows.

Light travels faster than sound. That's why some people appear bright
until they speak!

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